Search gender: all male female Ninya Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: ninya Katakana: ニンヤ 0 Kanji: 忍也 Meaning: 忍Endure. To keep out of sight. To keep people from knowing. Ninja or ninjutsu. To have in this way. Cruelty. 也Affirmation. Words for exclamations, questions, and antonyms. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Ninya Boy Name Meaning, Kanji Variations.